I am trying to get the excel spreadsheet data and converting it in someway to java. I'm looking for something that will print out the java code itself that way I can embed it into future projects.
View RepliesI have an excel spreadsheet, with a specific filename and location which doesn't change (e.g. C:/workbook.xls)What I would like to do is have a window open when I open an .exe file, and in this window is a bunch of check boxes, text areas and drop down boxes (I can implement these, that's about my level of JAVA)
Then, when I click on a button in this window (for example, a button which says "Save"), the data from all these boxes and menus etc. goes into specific cells in the excel spreadsheet. Or if certain values are selected from a drop down menu, then a bunch of cells are empty.
I am reading Excel data using java apache. I got format issue while reading double value such as 869.87929 (in excel) into 869.8792899999999 (in java).
I'm using following files to read excel data.
1. Schema.csv: SheetName,2-int-Double
2. File.xls:
col1 | col2
123 | 869.87929
Sample code:
if(type.equals("Double")){
String str = content[i-1];
//System.out.println(str);
BigDecimal d = new BigDecimal(str);
listObjects.add(d);
}
Note: type from schema.csv & content [] value from file.xls
If I print **str**, it shows value as 869.8792899999999.
But i need to get **str** value as 869.87929. How can I get it?
How to we append data in an excel sheet through Java ?
View Replies View Relatedi am getting the following errors.
Exception in thread "main" java.lang.NullPointerException
at java.io.Reader.<init>(Unknown Source)
at java.io.InputStreamReader.<init>(Unknown Source)
at ToHtml.printStyles(ToHtml.java:215)
at ToHtml.printInlineStyle(ToHtml.java:199)
[code]...
import data from excel sheet into mysql database through a java program. How coding will be done in Core Java.
View Replies View RelatedIf I want to load data in excel file into table. what is the best way to do it?
View Replies View Relatedi have to write more than 100000 rows in a excel sheet (file size more than 20 MB) via java.
when i use XSSF, i am getting below Error.
java.lang.OutOfMemoryError: Java heap space
at org.apache.xmlbeans.impl.store.Saver$TextSaver.resize(Saver.java:1592)
at org.apache.xmlbeans.impl.store.Saver$TextSaver.preEmit(Saver.java:1223)
at org.apache.xmlbeans.impl.store.Saver$TextSaver.emit(Saver.java:1144)
[Code]....
when i use HSSF , i am getting the below Error.
java.lang.OutOfMemoryError: Java heap space
I have tried increasing the java heap size , by giving upto -Xms1500m -Xmx2048m
I am a beginner in Java and I have a task of reading excel document and converting it into a text file.
View Replies View RelatedHow to append the data in excel .. Checking the file if its known or unknown then save it to excel file like example
when i first run the program 3 files there in excel
when i run for the second time same it will be 6 files there in java
Here is the code
public String QueryACL(String myFilePaths) {
try {
SHAOneReported = new PrintWriter(new FileOutputStream(TodayDate.format(date) + "-SHA1SummaryReport.xls", true));
} catch (FileNotFoundException exc) {
JOptionPane.showMessageDialog(null, "File not Found.");
[Code] ....
I am using JSF,richfaces. Need to import data from Excel file and show it in datatable.
How to achieve this?
I have a requirement to download the data from DB to CSV/Excel. What I did is retrieving all the records from DB and store in the List and pass that list to the jsp page. In JSP page, I am using the below setting to download it to CSV/EXCEL.
response.setContentType("application/vnd.ms-excel");
String fileName = "Report"+System.currentTimeMillis()+".xls";
response.setHeader("Content-disposition","attachment;filename="+fileName);
It was working fine. But I have an issues in it. Excel is capable of storing it only 65,536 rows. Even all the data getting downloaded to CSV/excel (> 65,536), while saving I am getting error from excel saying that it can't save more than 65,536 rows and the below data won't be saved.
This workbook contains data in cells outside of the row and column limit of the selected file format.
Data beyond 256 (IV) columns by 65,536 rows will not be saved.
Formula references to data in this region will return a #REF! error.
I am not opt for POI apache third party at this point of time. Is it possible to download it in other sheets if it exceeds the max limit.
Example: Having data of around 100,000.
Download 65,536 - Sheet 1
Remaining in Sheet 2,3.. of the same excel.
Export data to excell using XSSFWorkbook ... I am having error
javax.el.ELException: java.lang.OutOfMemoryError: Java heap space
Now I what to modify my code to BigGridDemo.java
[URL] ....
[URL] ....
How can I modify my code to BigGridDemo.java. This is my code
import com.bea.common.security.xacml.context.Result;
import com.sun.jmx.snmp.Timestamp;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
[Code] ....
I have to export data to excel using XSSFWorkbook
I am having error javax.el.ELException: java.lang.OutOfMemoryError: Java heap space now i what to modify my code to BigGridDemo.java
org.apache.poi.xssf.usermodel.examples: BigGridDemo.java
POI - User - HSSF and XSSF memory usage, some numbers
How can i modify my code to BigGridDemo.java
Java Code:
import com.bea.common.security.xacml.context.Result;
import com.sun.jmx.snmp.Timestamp;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
[Code] ....
Currently am geting this error with above code
<FileDownloadActionListener> <processAction>
javax.el.ELException: java.lang.OutOfMemoryError: Java heap space
at com.sun.el.parser.AstValue.invoke(Unknown Source)
at com.sun.el.MethodExpressionImpl.invoke(Unknown Source)
[Code] ......
I'm trying to insert data into an excel sheet with the below Servlet.
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
import java.beans.Statement;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
[Code] ....
But it is giving me the below Exception and stacktrace
java.text.ParseException: Unparseable date: "2-Apr"
at java.text.DateFormat.parse(DateFormat.java:357)
at Serv1.doPost(Serv1.java:53)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:644)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
[Code] ....
i found that the problem is within the date field(, if the problem is with the date, how i can fix it and where am i going wrong.
A group of my classmates and I were discussing strings. We were asked, "What circumstances would you want to convert a text string to numerical data?" but we couldn't think of any answers outside of counting characters within the string for various applications.
View Replies View RelatedHow I'm supposed to write out the statement.
I am fairly certain that I should be making variable "b" and "c" a float. But beyond that I'm confused.
uploadfromtaptalk1407333378833.jpg
Recently we got an issue about file download. We are using below code to fetch the data from backend(DB2) and export to excel.
Before Jan 15 it use to take 2 minutes to download the file (2 MB size). But now its taking half an hour to download.
response.setContentType("application/vnd.ms-excel");
response.setHeader("content-disposition","attachment; filename=Attendance_Report.xls");
We have restarted server, system but still problem exists. We found that there is no code level or data base level or network level issues.
Now we have to see server level issue. What are the factors which effects the file downloading at server level.
We are using websphere 6.1 ,java1.4
I have a requirement to read all the xml files from a parent folder and write in a spreadsheet(separate spreadsheet for each xml file)
I have written the below code in which xml and excel file name are hardcoded. The format of xml file is same.
package xmlexcel;
import org.apache.poi.hssf.usermodel.*;
import java.util.ArrayList;
import java.awt.List;
import java.io.*;
import java.util.ArrayList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
[Code]...
When I try to convert this value, "Testingu2120" (along with UTF coed u2120)comes as a string as part of SOAP response. I need to convert this UTF-8 characters in to a symbol, in this case it is SM (Service Mark) symbol and show it on the UI.
How can we achieve this in JAVA?
I have four different UTF-8 character set to convert.
TM - u2122
SM -u2120
R - u00AE
C - u00A9
text="🎂🍰 Happy Birthday! 🍭🍒🌺💐"
but when i read from excel file after write it into excel file the output is--
???? Happy Birthday! ????????
I have a JSP and Java program which will read data from Excel and add them dynamically to create table.My requirement is i should able to edit the columns what ever the data that was fetched from Excel and export those contents to another excel file.This should happen on clicking a button, i mean to exporting the contents of the table.
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How could we create excel sheets(xls) in java?
View Replies View Relatedi don't have good grip in java, basically i am a software Tester and rightnow i am automating my application with Selenium (Testing Tool) so i need to write a script in java, so far i Worked with QTP for the same but in that its really easy to Data Driven test with Excel but here i am facing lots of problem. how to read/Write data from excel with java. how can i create input dialog box (like prompt in jscript) ?
View Replies View RelatedI am new to java. I have written a function in C#,how can i convert it into Java.
public AsymmetricKey readKey(String filename)
{
StreamReader reader = new StreamReader(filename);
String modulus64 = reader.readLine();
String exponent64 = reader.readLine();
byte[] modulusBytes = base64Decode(modulus64);
byte[] exponentBytes = base64Decode(exponent64);
BigInteger modulus = new BigInteger(modulusBytes);
BigInteger exponent = new BigInteger(exponentBytes);
AsymmetricKey key = new AsymmetricKey(modulus, exponent);
[code]....